gallery disappearing

Is there a way to keep or imbed a gallery with a writer document. I frequently move files from my desktop to my laptop for work, and sometimes share the document with others. When I do, the gallery and its images disappear. The images I selected for use from the gallery are still in the document, but I have to create a new gallery to use the images again. Is there a way to prevent this, or am I doing something wrong? I am using Libreoffice 6 running on Windows 10.

Which operating system and LibreOffice version do have others?

In which file format do you and others save?